911 Turbo S Cabriolet (996) F6-3.6L Turbo (2005)
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Similar to the 911 Carrera models (996), the kinematic toe-in is not adjustable!
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Camber and toe can be adjusted via eccentrics!
Front axle
Warning:
Danger of injury and damage to property due to malfunctions in the PSM control range if the steering angle sensor is not calibrated or is
calibrated incorrectly!
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Calibrate steering angle sensor with wheels in straight-ahead position with the Porsche System Tester 2!
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The steering angle sensor actual value must be checked after a suspension alignment which resulted in no changes being made to the
wheel alignment values!
Information:
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The caster is not adjustable!
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After adjusting the toe, the lock nuts on the track rods must be tightened to the prescribed tightening torque of 50 Nm (37 ftlb.)!
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The steering angle sensor must be calibrated if the previous wheel alignment values (on rear and/or front axle) were changed!
General procedure for suspension alignment
Information:
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Carry out suspension alignment with an optical or electronic wheel alignment tester!
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The measurement procedures should be taken from the operating instructions for the wheel alignment tester involved!
In order to exclude erroneous measurements, the following preconditions must be met before alignment and the following points should be given
special attention:
Empty weight of vehicle in accordance with DIN 70020, i.e. car ready for the road, with full fuel tank, spare wheel (collapsible wheel) and tools.
Ball-joint and wheel-bearing play in order (wheel-bearing play cannot be adjusted).
Tire pressure in accordance with regulations, fairly uniform tire tread.
Quick-clamping holder for the 911 Turbo with adapter (for the measured-value pickups) correctly secured to the wheels.
Receiving surfaces for the quick-clamping holder on the wheels and the adapter surfaces must be clean and flat. Always check the levelling surface on
the wheels precisely in particular before fitting the quick-clamping holders.
Strictly comply with maintenance intervals for measuring equipment and measuring platform. If the levelling of the measuring platform or of the
measuring area is done in-house, levelling equipment is required. A hose level is inadequate!
Skilled handling of measuring equipment and measuring platform.
Sliding plates with transverse motion (rotary motion) at the rear axle are advisable.
Observe the Technical Literature of PAG, the manufacturer of the measuring equipment and the manufacturer of the measuring platform.
Do not treat measured values as a whole, but very critically in regard to driving dynamics, high-speed strength of the tires, tire wear and cost/benefit
effects (time required for correction of insubstantial deviations). The toe values are of decisive significance for driving dynamics and tire wear.
If the vehicle is measured front and rear, check and adjust the wheel alignment values at the rear axle first. Camber values at the front axle apply for
the straight-ahead position of the wheels. Steering wheel and steering gear in center position when toe is being adjusted.
Before wheel alignment values are adjusted at front and rear axles, it is recommended that the vehicle height be checked at the DIN empty weight.
Conclusions can then be drawn about wheel alignment values in the event of any suspension alignment that becomes necessary later.
Vehicle height (vehicle height check)
General
Information:
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The vehicle height at front and rear axle is not adjustable!
Preliminary work
1. For the height check, place the vehicle on a level surface or on the measuring platform (ready to drive, with a full tank, spare wheel and tools).
2. Compress vehicle at front and rear by approximately 25 mm 2-3 times and allow it to spring back freely.
